Starting-crank for explosive-engines.



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Patente@ 1o-m19, 1912.

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HERMANN H. K OLB, OF BADGER, IOWA.

STARTING-CRANK FOR EXPLOSIVE-ENGINES.

Specification of Letters Patent.

Patented Nev. 19, 1912.

`pplicaton filed March 28,?191'2. Serial No. 686,853.'

To all whom it may concern.'

Be it known that I, HERMAN-N H. Kona, a citizen of the United States, residing at Badger, in the county of Webster and Sta-te of Iowa, have invented new and' useful Iniproif'einents in Startingranks for Explosive-Engines, of which the followingis a specification.

My invention relates to starting cranks for explosive engines.

rlhe object of my invention is to produce a starting crank for explosive engines in which injury to the operator is obviated in` case or" back firing or reversal ot' the engine.

A- further object thereof is to produce a crank of said character having a grip or handle yieldingly attached upon the shank ot the crank adapted to beheld in operative position at a predetermined tension, but allowing the handle to slip sidewise upon the shankwhen resisted by more than the predetermined orce, and a still further object of my invention is to produce a more simple, cheap and. efficient safety crank than has heretofore been provided. j

To these ends, my invention includesl the combination and 4arrangement of component parts to lbe hereinafter described and more particularly pointed out in the claims.

In the accompanyingdrawings, in which like reference characters indicate similar parts, Figure l is a perspective view of mv invention; Fig. 2 is a longitudinal sectionalcates a crank for starting explosive engines comprising the shank 2, the laterally d1sposed cylindrical head 3 adapted to engage the end of an engine shaft, and the yieldably attached laterally extending handle 4. As shown in the drawings, the shank 2, adjacent to its outer end, is provided with an enlarged portion 5 forming an annular shoulder, the outer face of which is serrated to engage the serrated face 8* of the handle versely zit-8 threaded at 6 to receive the nut .12, hereinafter described. The handle 4, comprises the grip 7 and head 8, which is pierced transto receive the end portion 2 of the shank 2, and one face of said handle head is serrated at 8" to mesh with the serrated shoulder 5 on the shank. The handle portion 4, thus described, is secured yieldably upon the shank by the sleeve 9 sur-k rounding the outer portion 2 of the shank. which is provided with an' inwardly extendl ing annular flange 9 adapted to tit snugly around said outer portion of the shank, and rests upon the head 8 of the handle, Within said sleeve is carried the coil spring l0 which rests upon the flange 9', and is held therein by the cap 11 loosely fitting upon the end of the shank and within the collar and bearing upon the coil-spring carried therein. Said cap is held in position and adjusted longitudinally upon the shank bythe nut 12 screwed upon the end of the shank.

From the foregoing description 4and by reference to the accompanying drawings, it will be apparent that the handle is held upon the shank at the preferred angle for turning the engine shaft, and yieldingly held in such position by the sleeve 9, spring 10, cap 11, and nut 12, the latter of which may be adjusted longitudinally ,upon the shaft to regulate the tension of the spring 10 and theconsequent pressure of the serrated face of the handle upon the contacting -tace of the shoulder upon the shank, and thus secure saine sufficiently rigid for the purpose of use. If, however, the engine should back fire or reverse when starting and throw the crank out of the hands of the operator and 'strike his arm, as frequently occurs, the force would be suilicient to dis.- place the position of the handle without in- Hicting serious injury.

Having thus described my invention, what I claim as new and desire to be secured by Letters Pat-ent, is-

4. The .outer end of the shank is screwl. A. crank for starting explosive engines,

`controlling the pressure of the contacting parts of the shank and handle, and means for regulating the tension of the spring, su'ostantially as described'. i 2. A crank for starting explosive engines, comprising a shank, en annular shoulder adjacent to ithe outer end thereof, a handle 'comprising a shank, an annular serrated shoulder adjacent to the outer end thereof, a handle yieldably secured upon the shank having serrations thereon meshing Withthe serrations on the shoulder, a slidable spring pressed sleeve for holding parts in Contact, and any adjustable-cap and nut for regulating the pressurepf the hani l(lle on said shoulder,V substantially as de- HERMANN HKQLB. l]

scribed.

Witnesses:

ALBERT C. KoLB, HuNY L. l/VEIss.

Copies of this patent niay be obtained for ve cents each, by addressing the Comniissioner of Patents,

v Washington, D. C.

said serrated 10 

